TRAILER.POSSIBILITY THAT INDUCTION HARDENING PROCESS IN EFFECT AT NORTHAMERICAN ROCKWELL'S AXLE PLANT MAY HAVE CREATEDHIGH RESIDUAL STRESSES AT INNERBEARING SHOULDER AREA.STRESSES MAY TURN INTO PHYSICAL CRACKS UNDER EXTENDEDFIELD SERVICE.CONTINUED USE OF AXLE AFTER CRACKING MAY CAUSE AXLE SPINDLE TOFRACTURE.(CORRECT BY INSPECTING AND REPLACING WITHNEW AXLE.)